Neha solves the subtraction problem 673 – 257 using mental steps: "257 + 400 = 657; 657 + 20 = 677; 677 – 4 = 673. Therefore, 400 + 20 – 4 = 416." Which of the following statements is most appropriate regarding her strategy?

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Education · Mathematics Pedagogy

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

It shows that Neha uses her conceptual understanding of arithmetic to develop her own personal algorithm.

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Answer 1

It represents an informal strategy that must be discouraged and not permitted in written examinations.

Answer 2

It shows that Neha is unnecessarily complicating the problem by integrating addition into subtraction.

Answer 3

It indicates that Neha completely lacks knowledge of the formal algorithm for subtraction.

Answer 4

It shows that Neha uses her conceptual understanding of arithmetic to develop her own personal algorithm.

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